package com.wl.rjwmc.Controller;

import com.wl.rjwmc.Utools.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.UUID;

@RequestMapping("common")
@RestController
@Slf4j
public class CommonController {
//   存储位置
    @Value("${reggie.path}")
    private String basePath;
    @PostMapping("upload")
    public R<String> upload(MultipartFile file){
        log.info(file.toString());
//        得到上传时的文件名
        String oFile = file.getOriginalFilename();
//        截取点前面的文件名
        String oFileSub = oFile.substring(oFile.lastIndexOf("."));
        //使用UUID重新生成文件名，防止文件名称重复造成文件覆盖
        String fileName = UUID.randomUUID().toString()+oFileSub;

//        创建目录
        File dir = new File(basePath);

        if(!dir.exists()){
            dir.mkdir();
        }

        try{
//            将临时文件转存到指定位置
            file.transferTo(new File(basePath+fileName));
        } catch (IOException e){
            e.printStackTrace();
        }
        return R.success(fileName);
    }
    @GetMapping("download")
    public void download(String name, HttpServletResponse response){
        try {
            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));
            ServletOutputStream outputStream = response.getOutputStream();
            response.setContentType("image/jpeg");

            int len = 0;
            byte[] bytes = new byte[1024];

            while ((len = fileInputStream.read(bytes))!=-1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }
            outputStream.close();
            fileInputStream.close();

        } catch (Exception e){
            e.printStackTrace();
        }
    }
}
